Ranking of Oregon Counties By Percentage of Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)

Updated on September 3, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the population of Oregon (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 22.48%. Among all Oregon counties, Harney County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (36.82%), followed by Grant County (35.56%), and Lake County (33.85%).

The chart below shows the top 10 Oregon counties, and the table below shows the ranking of all Oregon counties.

You can see similar information for other educational attainments.

You can also see similar information for other states and for the United States.

Ranking of Oregon Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Harney County
Grant County
Lake County
Morrow County
Union County
Columbia County
Klamath County
Gilliam County
Douglas County
Wheeler County
Ranking of Oregon Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Harney County 36.82
2 Grant County 35.56
3 Lake County 33.85
4 Morrow County 33.24
5 Union County 33.08
6 Columbia County 32.87
7 Klamath County 32.74
8 Gilliam County 32.34
9 Douglas County 32.04
10 Wheeler County 31.89
11 Malheur County 31.66
12 Crook County 31.63
13 Sherman County 30.90
14 Josephine County 30.54
15 Coos County 30.07
16 Umatilla County 29.68
17 Tillamook County 29.42
18 Jefferson County 29.41
19 Baker County 29.35
20 Linn County 28.89
21 Wallowa County 28.22
22 Curry County 27.48
23 Clatsop County 27.46
24 Wasco County 26.98
25 Marion County 25.68
26 Jackson County 25.26
27 Lincoln County 24.07
28 Yamhill County 23.88
29 Polk County 22.94
30 Lane County 22.69
31 Clackamas County 21.66
32 Deschutes County 20.24
33 Hood River County 19.09
34 Washington County 17.30
35 Multnomah County 17.02
36 Benton County 14.45